Ron Roy on wed 25 apr 07
I can't comment on the recipies with ash in them because I don't have an
analysis for the ash used - or wether it is washed or not in one case.
The Red Art 580 + dolomite 80 + whiting looks promosing - right amount of
iron and expansion consistant with the analysis I have of Alabany - there
are many analysis.
The R Art 80, ball 20, Dolomite 10, whiting 10 seems too refractory and the
expansion a bit low.
The "Little Alex" recipe has a lot more iron than the original Albany but
the calculated expansion is nearly the same.
RR
>From my Twice-Fired Glazes Pottery Making Illustrated ran sometime last
>year.[this would be 2000]
>
>
>
>These glazes all are fired to c. 6 first. Then they may or may not be
>refired to c.04 for color changes. Strongly affected by clay body
>underneath. Use slips and check out.
>
>
>
>These started out as ALbany glazes from Hobart Cowles's twice fired
>glazes.
>
>
>
>To replicate ALBANY: Mix
>RA 580
>Dolomite 80
>Whiting 25
>
>
>
>This if for glazes WITH extra iron (RA has more than Albany)
>
>
>
>For those without extra Iron
>
>
>
>RA 80
>BallClay 20
>Dolomite 10
>Wollastonite 10
>
>
>
>Hannah's APPLE BUTTER
>RA mix 75
>Washed Ash 14
>Talc14
>
>At c.6 satiny butter-scotch. More fluid over slips
>At c.o4 rich satiny apple butter color.
>
>
>
>for those who don't know apple butter--think very caramelized apple
>sauce,golden ale, that idea.
>
>
>
>LITTLE ALEX
>
>
>
>RA Mix 60
>Neph Sy 20
>Dolomite 10
>Frit 3185 20
>Fe203 5
>
>
>
>At c.6 rich semi-trans shiny brown
>at c.04 almost metallic, satiny, rich brown, with hints of dark rich red.]
>
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
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